<!DOCTYPE html>
<html lang="en">

<head>
    <meta charset="UTF-8">
    <meta name="viewport"
        content="width=device-width, initial-scale=1.0, maximum-scale=1.0, minimum-scale=1.0, user-scalable=0">
    <meta http-equiv="X-UA-Compatible" content="ie=edge">
    <title>Document</title>
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<script>
    //     alert(`您的姓名是: ${prompt('请输入您的姓名')}
    // 您的年龄是: ${prompt('请输入您的年龄')}
    // 您的性别是: ${prompt('请输入您的性别')}`)
    // var i = '1';
    // alert(++i);
    // var p = 10;
    // alert(p++ - p++ + ++p) //12

    // alert(0 || undefined || '' || NaN || false || null);
    // alert(1 && true && '1');
    // var age = 10;
    // alert(age += '2');
    // var age = 10;
    // alert(age -= '2');
    // var age = 10;
    // alert(age *= '2');
    // var age = 10;
    // alert(age /= '2');
    // var age = 10;
    // alert(age %= '2')
// alert(undefined == null)
</script>

<body>

</body>

</html>